[comova]

This shape, known since at least Plato's time and named by Kepler, has fascinated thinkers from Archimedes to Buckminster Fuller. As its name implies, it's somewhere between a cube and an octahedron, taking six and eight of its 14 sides from each of those respectively. It's rounder than either of those shapes though, making it a much better vessel for salt, olives, or weed.